Play a video full screen 'On Scene load'

I’m working on some video presentation witch will run offline. On main scene I have a small images as a video thumbials. On these thumbials each are the functions “Jump to scene” linked to the scenes with videos. Each video is in another scene. It is working now. But if I want to get video full screen, I have to click on the full screen icon in the player and than I have to click Play.

I would like to click on the thumbial on main scene and then will video start playing full screen automaticly. When the video finishes, automaticly turns back to main scene.

I was looking for some codes but I dont have much skill with coding.